From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F2F6C433FE for ; Thu, 3 Feb 2022 20:32:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354585AbiBCUcL (ORCPT ); Thu, 3 Feb 2022 15:32:11 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:34480 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354421AbiBCUbV (ORCPT ); Thu, 3 Feb 2022 15:31:21 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 57D55B835A7; Thu, 3 Feb 2022 20:31:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D003BC340F2; Thu, 3 Feb 2022 20:31:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643920279; bh=6ytp33LHeA0fWlCO8dxFEv7EPxbWH7tru4IbV3pym4A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MUtEKr1lQWjUhOtjTf52BGtHYAP3iM7+fCLpv7Wggg1ZdhmkaR78ossZ4g11Ke26g 8hM0N1T8mlSpN1zGGWw41Rfx5gKb7LD9IeLytki7dxwWWmW8vsJ8lrHwe30DPe2ZGC z//vNCvk0tXG6ojX55c+NnrQEHEJu2ESEbenB9wfjEdppuDqMxZvo/hfoNXYt1EU/F ktMKo3iebjlSDYtJoLfwEq64xM++w++W+suach+P0eU+rxGm6tf7luTzyIiWN1S+wo jNoEpkJws4cgf6G29X20iFQ5jpbI8MA16qBaOqJ5xokOBEjPT2yjdKw7XAVSwoPmaw MUlVV8rCeCTUA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jisheng Zhang , "David S . Miller" , Sasha Levin , peppe.cavallaro@st.com, alexandre.torgue@foss.st.com, joabreu@synopsys.com, kuba@kernel.org, mcoquelin.stm32@gmail.com, netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.16 35/52] net: stmmac: reduce unnecessary wakeups from eee sw timer Date: Thu, 3 Feb 2022 15:29:29 -0500 Message-Id: <20220203202947.2304-35-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220203202947.2304-1-sashal@kernel.org> References: <20220203202947.2304-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Jisheng Zhang [ Upstream commit c74ead223deb88bdf18af8c772d7ca5a9b6c3c2b ] Currently, on EEE capable platforms, if EEE SW timer is used, the SW timer cause 1 wakeup/s even if the TX has successfully entered EEE. Remove this unnecessary wakeup by only calling mod_timer() if we haven't successfully entered EEE. Signed-off-by: Jisheng Zhang Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index e81a79845d425..a361ad8e863ae 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -400,7 +400,7 @@ static void stmmac_lpi_entry_timer_config(struct stmmac_priv *priv, bool en) * Description: this function is to verify and enter in LPI mode in case of * EEE. */ -static void stmmac_enable_eee_mode(struct stmmac_priv *priv) +static int stmmac_enable_eee_mode(struct stmmac_priv *priv) { u32 tx_cnt = priv->plat->tx_queues_to_use; u32 queue; @@ -410,13 +410,14 @@ static void stmmac_enable_eee_mode(struct stmmac_priv *priv) struct stmmac_tx_queue *tx_q = &priv->tx_queue[queue]; if (tx_q->dirty_tx != tx_q->cur_tx) - return; /* still unfinished work */ + return -EBUSY; /* still unfinished work */ } /* Check and enter in LPI mode */ if (!priv->tx_path_in_lpi_mode) stmmac_set_eee_mode(priv, priv->hw, priv->plat->en_tx_lpi_clockgating); + return 0; } /** @@ -448,8 +449,8 @@ static void stmmac_eee_ctrl_timer(struct timer_list *t) { struct stmmac_priv *priv = from_timer(priv, t, eee_ctrl_timer); - stmmac_enable_eee_mode(priv); - mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(priv->tx_lpi_timer)); + if (stmmac_enable_eee_mode(priv)) + mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(priv->tx_lpi_timer)); } /** @@ -2640,8 +2641,8 @@ static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue) if (priv->eee_enabled && !priv->tx_path_in_lpi_mode && priv->eee_sw_timer_en) { - stmmac_enable_eee_mode(priv); - mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(priv->tx_lpi_timer)); + if (stmmac_enable_eee_mode(priv)) + mod_timer(&priv->eee_ctrl_timer, STMMAC_LPI_T(priv->tx_lpi_timer)); } /* We still have pending packets, let's call for a new scheduling */ -- 2.34.1